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Title: Positron-acoustic shock waves associated with cold viscous positron fluid in superthermal electron-positron-ion plasmas

A theoretical investigation is made on the positron-acoustic (PA) shock waves (SHWs) in an unmagnetized electron-positron-ion plasma containing immobile positive ions, cold mobile positrons, and hot positrons and electrons following the kappa (κ) distribution. The cold positron kinematic viscosity is taken into account, and the reductive perturbation method is used to derive the Burgers equation. It is found that the viscous force acting on cold mobile positron fluid is a source of dissipation and is responsible for the formation of the PA SHWs. It is also observed that the fundamental properties of the PA SHWs are significantly modified by the effects of different parameters associated with superthermal (κ distributed) hot positrons and electrons.
Authors:
; ;  [1]
  1. Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh)
Publication Date:
OSTI Identifier:
22490924
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DISTRIBUTION; ELECTRONS; EQUATIONS; ION ACOUSTIC WAVES; PERTURBATION THEORY; PLASMA; POSITRONS; SHOCK WAVES; VISCOSITY